Automatic threading die



Navy, 1.3, @233.

. Q.A.$WHTH ET'AL AUTOMATIC THREADING DIE Filed Jan. 17, 1922 3 Sheets-Sheet 2 @QRN 36% Him/mug wA /QW NW 13, m3. 21,474,179

0. A. SMITH ET AL AUTOMATIC THREADING DIE Filed Jan. 1'7. 1922 3 Sheets-Sheet 5 Fatented Nov. is, teas.

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mauve OSCAR A. SMITH, OF EAST CLEVELAND, AND BENJAMIN RINDFLEISCH, F canva- LAND, OHIO, ASSIGNORS TO NATIONAL ACME COMPANY, OF CLEVELAND, 018E1 0, A.

CORPO T1031 OF OHIO.

A'UTDMATIC 'JLIBIREAJDING DIE.

Application filed January 17, 1922. Serial Iil'o. 529,897.

BENJAMIN RINDFLEISGH, citizens of the United States, residing at East Cleveland and Cleveland, respectively, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Automatic Threading *Dies, of which the following is a specification.

This invention relates to threading dies for either stationary or revolving spindles, an object thereof being to provide an improved die mechanism so organized and constructed by virtue of the simplification and interchangeability of the parts as to readily adapt the same for use with either stationary or revolving spindles, whereby the die head comprising the main working parts may be used whereheretofore two mechanisms were used.

A further objectof this invention is to provide an improvedthreading die wherein the working parts are so constructed as to enable the same to be hardened and ground practically as well as on-a commercially productive basis. As a result of the present improved construction the die head is not only simpler inconstruction than heretofore but maybe practicably hardened and ground so as to enable the same to remain in substantially perfect working condition a considerably longer time than die heads heretofore constructed which it was not practicably possible to harden and grind. Furthermore by virtue of the present invention the die is rendered more etfioient and accurate, simpler in construction more durable in use, and more economical to manufacture.

Other objects of this invention will appear in the following description thereof, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters indicate corresponding parts in the sev' eral views and whereln Fig. 1 is a sectional view of a stationary spindle die or hand die embodying my invention; Fig. 2 is a front view thereof partly broken away; Fig. 3 is a sectional fragmentary view illustrating the die in an open position; Fig. 4; is a fragmentary view illustrating the mounting of the adjusting screw and dog; Fi 5 is a front view partly broken away of t e structure indicated in Fig. 6; Fig. 6 is a sectional view of a revolving spindle die embodying my invention; Fig. 7 is a sectional fragmentary view thereof illustrating the die in open or released position; Fig. 8 isa perspective view partly broken away of a revolving spindle die and the operating part thereof;

Fig. 9 is a perspective view showing the chaser mechanism for both types of dies; Fig. 10 is a fra mentary perspective view of the cap used For-both ty es of dies; Fig.- 11 1s a perspective view of t e shank for the stationary spindle die; Fig. 12 illustrates the body thereof; Fig. 13 illustrates the adjusting ring thereof; Fig. 1&1 illustrates the floatring thereof; and Fig. 15 illustrates the cooperating handle thereof. 1

' The present invention is an improvementin part over Patent 1,038,670 dated September 17, 1912, and Patent 1,057 ,014 dated March 25, 1913, granted to Oscar A. Smith, one of the present joint inventors. In each of these patents as a result of the use of a cam disc with its projecting arms located between the chasers or body and the cap or housing of the die, the latter could not readily be made thicker because the diameter of the die could not be practicably increased. hence neither the cap nor the working parts of the die, with the exception of the chasers and camming. portions could be hardened. But by virtue of the present invention the disc is eliminated and the cap itself is provided with the cam faces and hence the cap can be made thicker and at the same time the diameter of the die smaller when desired. On account of the increased thickness ofthe cap it may be hardened and ground commercially which was not practicable heretofore as the caps have to be so thin that this could not be commercially done. As a consequence of the present improvement the die 18 notcomprises a die body 2 of substantially the same construction for both revolving and stationary spindledies (Figs. 8 and 12). Each die body has a rearwardly extended shank 3 j of suitable length, and is provided with a plurality, as four, guides or ways 4 extendng radially of the diebodies. The rear port ons of these waysare grooved or under-cut at 5 to form recesses, and in the same slide chasers 6, each thereof secured by means of a screw 50 to a' guide plate or block 7, the chaser and guide plate having cooperating openings for permitting attachment. Each plate 7 is provided with a projecting pin 9 in position to engage a coiled spring 10 located in a recess or opening 11 in the die body. The guide plates, it will thus be seen, project beyond the two side faces of the chasers into the recesses 8 whereby the chasers are guided in their opening and c osing movements and maintained against depthwise movement; fective to shift the chasers outwardly from the axis of the body, and in practice the projecting'pins 9 extend through the plate and fit into openings 12 in the under side of the chasers (see Fig. 1). The outer end of each chaser is tapered circumferentially throughout the major portion thereof as at 13 but straight in thedirection of the axis of the die. In the rear of these straight faces 13,

the chasers are provided with inclined faces 13. v

The die headcomprises a cap or housing 14 having a suitable central bore to receive the diebod 2, indicated in Figs. 8 and 12, and a suitab the cap is relief-bored at 15 to remove some of the bearing surface, the cap also having an inwardly extending flange or skirt 16 terminating 1n .a bore. For closing the die chasers suitable stations 17 are machined into the outer face of the cap (see Figs. 2 and 5)' and these stations, herein four in number, are milled so as to cooperate with the cammed portions13 of the die chasers,

the same being equally spaced and those- ..diametricaly opposite-each other being par- .allel in alinement. The faces-of these stations .are straight in the direction of the axis of the die. Curved depressions 18, herein four in number, are also machined in the-outer face of the cap adjacent to the milled stations, the ,same providing clearante for the cammed-portions of the chasers.

Q, or holdingthebody and the cap in proper assembled position relative .to one another thereby to permit the proper movement of.

.fthe cap relatively tofthe chasers, thesame is provided with a pair of countersunk openingsfi't), the shoulders of which are engaged 3 t 6 heads" of screws 20 which project 1 4 throughspacing collars 21 suitably housed Springs 10 are efle distance from the outer face" spindle the screws 20 (see Figs. 6 to 8 inclu sive) enter tapped holes 23 in the flanged operating spool 24, thelatter having a central bore adapted to be housed on the shank 3 of the die body and also having a suitable hub'portion 25 which enters the small bore of the die cap. Into the periphery of this spool is machined a suitable groove26, and

through the flanged portion of the spool is machinedan elongated slot 27. At right angles to the bore of the spool and centrally located. in this slot is housed by means of a bore 28, one end of which is screw-threaded, an adjusting screw or micrometer screw 29, the latter being provided with a groove which is ada ted to receive the bifurcated end (Fig. 7 of the adjusting dog or stud 31 located in slot 31 in the flange of the spool, this stud or dog being carried by the cam operating cap 14. When the die is thus assembled on the revolving spindle, and upon turning the adjusting screw to the rlght or to the left after loosening screws 20, the cap 14 having the cam face-17, may be adjusted circumferentially.

By virtue of this adjustment the cam operating cap 14 may be rotated or oscillated relatively to the chasers thereby adjusting the chasers relatively to the work by reason of the factthat the tapered cam surfaces 17 of the cap engage with the correspondingly tapered surfaces 13* of the chasers, this taper 36, the latter being housed on the shank 3 v of the body. Through this collar is machined a curved, elongated slot 37 and at right angles to the bore of the collar and centrally located in the slot 37 is housed by means of a bore 38, one end of which is screw-threaded the adjusting or micrometer screw 29. The operation of the adjusting screw upon the collar is substantially the v same as hereinbefore described in connection with the spool 24 and hence further descrip tion thereof is deemed unnecessary, understoodthat upon adjusting the screw, the cap 14 will be rotated thereby-to adjust, the cam portions 17,. relative to the cam faces 13. Located on .the shank 3 is a disc 41 carryingin a slotted part thereof a swinging lever 42, the end of which projects into an opening 43 in the shank 3, and to this dim is secured a spindle or rod 44 as i by means of screws 45. This spindle or r'od K is provided with a reduced hub portion 46;

projecting into the bore of the shank 3, the spindle or rod, t being understood, constitutit being.

Lemme ing the means for attaching the dieto the turret ofthe machine. Thus, when so attached, thedisc or head 41 and the spindle 44 are fixed against movement relatively to each other. The disc 41 is flexibly or resiliently connected to the float-ring 36 by means of screws and cushion springs 4'1 located in co'unterbored-bores 48 and threaded into openings in the float-ring or collar 36. The purpose and operation of these screws and cushion springs 4.7 is described in the hereinbefore mentioned Patent No. 1,057,014 and hence a further detailed description thereof is not deemed necessary herein. It Will be understood of course that by reason of the construction the entire die head com- I prising the die body, chasers, cam operating tion of the last thread being cut.

cap l t, and float-ring 36, will all move forward a predetermined distance away from the fixed disc 41 against the action of the cushion springs, after the turret has been stopped, so that at the .proper time the springs, having been sufliciently contracted, will pull back the cam cap 14 relatively to the die body and chasers. Thus the cam cap will be shifted to the position shown in Fig. 3 so as to permit the chasers to be opened by their springs 10 in a manner 'whichJvill be readily understood. The hand lever 42 may be shifted for the purpose of resetting the chasers with relation to the operating ca 14.

The operation of the die (Figs. 6 an. 7), When used in connection with a revolving spindle will be readily understood. When the collar 26 is moved forwardly. to the position shown in Fig. 6, the cam operating cap 14 closes the die by virtue of the cooperating cam faces 17 and 13 carried by the cap and chasers respectively. When the collar 26 is shifted rearwardly or backwardly, the cam surfaces 17 of the cap 1% recede from the high portions 13 of the chasers whereupon the springs 10 operate to shift the chasers outwardly and thereby open the die. v 1

The construction of the improved die is such that it is impossible for the die chasers to open whilethe thread is being out, even though the die chaser --operating means should be, by vibration or otherwise, slightly shifted. Thus, the thread will be cut the full length of the stock Without the mutila- In other words, the face 13 of each chaser, while circumferentially tapered, is however, straight inthe direction of the depth of the chaser or of the axis of the die, so that as stated no slight shifting of the parts will affect the position of the chasers. The construction is also such that without increasing the diameter or size of the die the cap or housing can be made thicker and thus permit it to be readily hardened and ground and itself carry the cam surfaces adapted to cooperate with the chasers instead of as heretofore,

necessitating the use of independent parts located within the housing for this purpose, whereby not only are certain parts and the cost thereof eliminated so that the structure of the die and its operation are much simplified, but a number of principal parts can. be interchangeably used, either to make up a die adapted for a stationary spindle, or one for-a revolving spindle, thus doing away with the necessity of having two distinct and complete dies on hand at all times.

We claim as our invention:

1. A threading die comprising a body member, a plurality of shiftable chasers carried by said member, and a sliding housing member axially slidable for controlling said chasers, said die having meansfor detachably connecting a stationary or rotary operating means in operative relation to said housing.

2. A threading die comprising a shank having an enlarged head or body member, a plurality of shiftable chasers carried by said head, and a sliding housing member having cam surfaces engageable with said chasers upon axial sliding movement of the housingmember, said die having means for detachably connecting a stationary or rotary operating means in operative relation to said housing member.

3. A threading die comprising a shank having an enlarged head or body member, a plurality of shiftable'chasers carried by said head, an axially shiftable housing member having means for controlling said chasers, and an operating sleevefdetachably connected to said housing member.

4:. A threading die comprising a shank adapted to be attached to a stationary or rotary spindle and having an enlargedhead, radially shiftable chasers carried by said head, a housing cap having a part slidable over said head, an operating sleeve, and detachable means for interconnecting said head, cap and sleeve, and permitting relative axial movement thereof. 1.

5. A threading die. comprising a shank adapted to be attached to a stationary or rotary spindle and having an enlarged head. radially shiftable chasers carried by said head, a housing cap having a part slidable over said head, and having a radially extending flange in rear'of said head, an operating sleeve, and detachable means for interconnecting said head, flange of the cap, and sleeve, and permitting relative axial movement thereof.

.6. A threading die comprising a shank adapted to be attached to a stationary or rotary spindle and having an enlarged head, radially shiftable chasers carried by said head, a housing cap having a part slidable not over said head, an operating sleeve, and deaxial movement thereof, said means having a slidable connection with said head, a fixed detachable connection with said sleeve, and

.a circumferential adjustable connection with said cap flange.

7. A threading die comprising a shank adapted to be attached to a stationary or rotary spindle and having an enlarged head, radially shiftable chasers carried by said head, a housin cap having a part slidable over said hea an operating sleeve, and detachable means for interconnecting said head, cap and sleeve, and permitting relative axial moveinent thereof, said cap having a part thereof shiftable into direct engagement with said chasers.

8. A threading die comprising a shank.

having an enlarged head, radially shiftable chasers carried by said head, a housing member embracing said head, means for shifting said housing member and head axially one relatively to the other for controlling the chasers, and means for adjiisting said housing member circumferentlally relatively to the chasers.

9. A threading die comprising a shank having an enlarged head, radially shiftable chasers carried by said head, a housing member embracing said head, means for shifting said housing member and head axially one relatively to the other for controlling the chasers, and means for adjusting said housing member circumferentially relatively to the chasers, said adjusting means having connection with said first mentioned means.

10. A threading die comprising a shank having an enlarged head, radially shiftable chasers carried by said head, a housing memfber embracing said head, means for shifting said housing member and head axially one relatively to the other for controlling the chasers, and means for adjusting said housing member circumferentially relatively to the chasers, said adjusting means having connection with said first mentioned means, and said housing member having cam surfaces at the outer end thereof adapted to directly engage the chasers.

11. A threading die comprising a'shank having an enlarged head, radially shiftable chasers carried by said head; a housing member having va part thereof provided with an internal face ofsubs'tantially the same diameter as the outer face of .said head and .embracing the same, and also having a radially extending flange in rear of said head, means for shifting said housing member axially oversaid head for controlling the chasers, and means extending through said flange fordetachablyconnecting said first means and said head. .12. A threading die comprising ashank having anenlarg ed head, radiallyshiftable' chasers carried by said head, a housing mem= ber having apart thereof provided with an internal face of substantially the same diameter as the outer face of said head and em bracing the same, and also having a radially extending flange in rear of said head, means for shifting said housing member axially over said headfor controlling the chasers, and means extending through said flange for detachably connecting said first means and said head, said flange having an elongated slot receiving said last means thereby permitting circumferential adjustment of said housing member.

13. A threading die comprising a body member, shiftable chasers carried thereby, a housing member embracing said body member, means for shifting said housing member and body member one relatively to the other for controlling the chasers, and means for adjusting said housing member and body member circumferentially-one relatively to the other.

14. A threading die comprising a body member, shiftable chasers carried thereby, a housing member embracing said body member, means for shifting said housing member and body member one relatively to the other for controlling the chasers, and means for detachably connecting said last'means and housing member.

15. A threading die comprising a body member, shiftable chasers carried thereby, a housing member embracing said body member,means for shifting said housing member and body member one relatively to the other for controlling the chasers, and means for detachably connecting said last means, housing member, and body member. a

16. A threading die comprising a body member, shiftable chasers carried thereby,'a housing member embracing said body member, means for shifting said housing member and body member one relatively to the other for controlling the chasers, and means for detachably connecting said last means,

housing member, and body member, said ferential movement of the body and housing members.

17. A threading die comprising a body member, radially shiftable chasers carried thereby, a housing member embracing said body member, operating means for shifting the housing and body members one relatively to the other to control the chasers, and means for slidably connecting said operating means and body member.

18. A threading die comprising a shank having an enlarged head, chasers carried by the head, an axially shiftable housing cap embracing the head, and means for shifting the-cap and comprising an operating sleeve mounted in rear of the cap and formed independently thereof, said cap being hardened to directly engage the chasers for operating them. Y Y

19. A threading die comprising a body member and a plurality of shiftable chasers carried thereby, and. an axially shiftable housing member therefor, said housing member bein hardened to directly engage the chasers or operatin them.

20. A threading 1e com rising at body member, a plurality of ra ially shiftable' chasers carried thereby, a housing cap hardened for engagement with the chasers, and means for shifting said cap in a plurality of directions relatively to the chasers.

21. A threadin die comprising a body member, a plum ity of radially shiftable chasers carried thereby, a housing cap hardened for engagement with the chasers, and means for shifting the cap axiall relatively to the chasers, and means for s ifting the cap eircumferentially relatively to the chaser-s.

Signed at Cleveland, Ohio, this 6th day of Jenna 1922.

%SCA]R A. SMITH.

BENJAMIN RINDFLEISCH. 

